The Directors of the Prize have established that plays will be received from specified professional theatres throughout the US, the UK and the Republic of Ireland, as well as other English-speaking countries. Each year, letters inviting submissions go out to the listed theatres (see links below) during the second half of August. Plays are due by September 15th in North America, and by September 20th in the UK.
Plays are eligible whether or not they have been produced, but any premiere production must have occurred within the preceding calendar year. Previous winning playwrights are not eligible.